The Season Three DVD was released today in the United States. According to an insert, the Season Four DVD will be released sometime in July 2003. This is subject to change, and no doubt will.
In other DVD news, according to Michael D’s Region 4 DVD Info Page the Season One DVD will be released in Australia on April 9th, 2003. According to the site, this is a confirmed release date. No official confirmation from FOX on any DVD releases outside the United States.